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overhead loading rack concrete pad is located near the west edge of the overhead truck <br /> loading rack pad. Two inactive overhead truck loading racks are located west of the tank <br /> farm area. <br /> A single underground pipeline located near the southwest corner of the former Time Oil <br /> terminal supplies ethanol fuel to tanks 33006 and 33007. The pipeline emerges from the <br /> subsurface inside the terminal property about 30 feet east of Navy Drive and is routed <br /> below grade on the south side of the tanks. An additional ethanol fuel supply pipeline is <br /> located in the southeast portion of the tank farm. Gasoline and diesel product were <br /> formerly delivered to the Time Oil terminal from the KMEP (former SPPL) petroleum <br /> terminal via a single underground pipeline located in the same area as the current ethanol <br /> fuel pipeline. Product was routed to the fuel ASTs inside the tank farm via a valve <br /> station (header) and two aboveground receiving lines, one dedicated to diesel fuel and <br /> connected to Tank 83009, and one dedicated to gasoline and connected to the six <br /> remaining ASTs. Outgoing product was delivered to the truck loading rack pump <br /> manifold by a system of aboveground piping. Six underground pipes delivered product <br /> from the pump manifold to the loading racks. Former 8-inch diameter underground <br /> product pipelines connected to the Port of Stockton dock area supplied the former Time <br /> Oil terminal tank farm with petroleum products until about 1975. Two additional active <br /> underground product pipelines operated by KMEP are located on the east side of Navy <br /> Drive on the west edge of the former Time Oil terminal, and are used to supply petroleum <br /> products to adjacent terminal facilities. <br /> Structures at the facility consist of an office building and maintenance shop located along <br /> Navy Drive. The area adjacent to the office building and loading racks is paved with <br /> either concrete or asphalt. The entire rest of the site is covered with gravel. <br /> 2.2 Geology and Hydrogeology <br /> Historical assessment data indicate that the lithology beneath the site consists of four <br /> discrete, sandy, water-bearing zones (A Zone through D Zone), separated by silty <br /> confining layers (SECOR, 2004). Groundwater is present in the A Zone from <br /> approximately 5 to 20 feet below grade surface (bgs), in the B Zone from approximately <br /> 25 to 40 feet bgs, in the C Zone from approximately 50 to 75 feet bgs, and in the D Zone <br /> from approximately 80 to 85 feet bgs. Measured depth to groundwater in the wells <br /> installed in all four zones ranges from approximately 2 to 8 feet bgs. The inferred <br /> groundwater flow direction in all four zones is toward the south/southeast or <br /> cast/southeast(Stantec, 2012). <br /> The following geologic and hydrogeologic summary was obtained from SECOR's <br /> Corrective Action Plan, Stockton Terminals Technical Committee Facilities, Port of <br /> Stockton, Stockton, California (SECOR, 2004), which references IT Corporation's Pilot <br /> Testing Work Plan, Stockton Fuel Distribution Terminals, Port of Stockton, Stockton, <br /> California(IT, 2001). <br /> Site Characterization Work Plan,Final, May 18,2012 <br /> 1007-012.002 2-2 <br />